TrustedReviews looked at the Leadtek WinFast PX8800 GTX TDH

DirectX 10 alters a lot of things, but the biggest change is the introduction of a geometry shader. This means that geometry is no longer processed on the CPU, but instead created directly on the GPU where it can then be manipulated or destroyed. This is a natural progression and lends itself easily to having physics processed on the GPU as well. With this in place, a lot less data is being inefficiently transferred across the PCI Express bus.

Leadtek WinFast PX8800 GTX TDH Review